No error in v3 when padding is of 0

theano/sandbox/cuda/dnn.py

@@ -1401,7 +1401,8 @@ class GpuDnnPoolDesc(GpuOp):
             raise RuntimeError("CuDNN pooling with padding requires CuDNN v2")
         if self.get_ndim() == 3 and version() < (3000, 3000):
             raise RuntimeError("CuDNN 3d pooling requires CuDNN v3")
-        if mode == 'average_exc_pad' and version() < (4004, 4004):
+        if (mode == 'average_exc_pad' and max(pad) > 0 and
+                version() < (4004, 4004)):
             raise RuntimeError(
                 "CuDNN pooling mode 'average_exc_pad' requires at least v4")
 

theano/sandbox/gpuarray/dnn.py

@@ -953,7 +953,7 @@ class GpuDnnPoolDesc(Op):
 
         if self.get_ndim() == 3 and version() < 3000:
             raise RuntimeError("CuDNN 3d pooling requires v3")
-        if mode == 'average_exc_pad' and version() < 4004:
+        if mode == 'average_exc_pad' and max(pad) > 0 and version() < 4004:
             raise RuntimeError(
                 "CuDNN pooling mode 'average_exc_pad' requires at least v4")